What do these fit?

[Skulldigger]

Anyone know what these will fit? I believe they are rear lenses for vintage mechanical sirens. They are just like the ones on my Sireno R5R except they are 1/8" larger. The Sireno takes a 4 to 4-1/8" base and this is 4-1/4" It's a great looking lens if I can find out what it fits. I have two of them. The are nearly cobalt blue color.
4-1/4" diameter base, 3" tall in center.

 

[StEaLtH2]

They could fit cab marker lights for a tractor, I’ve seen similar lenses on marker/clearance lights on older fire apparatus ...
food for thought...

 

[Skulldigger]

They could fit cab marker lights for a tractor,

these are pretty large at 4-1/4" most marker lights are only 2-1/2".

 

[lotsofbars]

They appear similar to the lens at the rear of the Sireno R5R siren, but they don't have the same lens fluting as other ones I've seen. It could be for a different rear light to a siren.

 

[NPS Ranger]

I agree, quite large for clearance lights. They remind me of the blue light fixtures mounted to a wall in commercial buildings, hospitals, etc to show the location of a fire extinguisher cabinet.

 

[894]

Clearance light lenses...

 

[Jtajk1995]

Would have to agree with the 5r5

 

[Skulldigger]

Would have to agree with the 5r5

It is 1/8" to big to fit the Sireno. I have two of them and the glass piece is 4" exactlly. 4-1/8" will fit, but the 1-1/4" will not and that is what these are. I am wondering if any of the Federal sirens with rear lights will take this size?

 

[Jtajk1995]

It is 1/8" to big to fit the Sireno. I have two of them and the glass piece is 4" exactlly. 4-1/8" will fit, but the 1-1/4" will not and that is what these are. I am wondering if any of the Federal sirens with rear lights will take this size?

Good call SD...